William w



(No Model.) I W. W. ANDERSON.

PIVOT PIN FOB; OLASPS.

Patented 001;, so, 1883.

Inventor Attorney.-

N. PETERS, Fholo-Lflhogmphnr. Washmgkm. D. a

UN TED STATES PATENT OFFICE.

WILLIAM wannnnson, on NEW YORK, N. Y.

PIVOT-PIN FOR CLASP'S.

SPECIFICATION forming part of Letters Patent No. 287,605, dated October30,1883. Application filed March 20, 1883. (No model.)

rate description of the same.

My improvement is applicable in making joints in many other articles;but as the invention will not require modification to adapt it to anyjoint within therange of applicability, it will not be necessary todescribe more than one article wherein it is used. For convenience, andbecause I propose specially to employ it with garment-clasps, I willshow and describe its application thereto.

Garment-clasps are made of thin metal, portions of opposite edges beingturned up and perforated to form ears, through which the j oint-pin isto pass. This joint-pin is formed of wire, and usually a head is formedby up setting one end before insertion through the ears. The unheadedend is then -upset by means of a hammer to form the second head.

eration one of difficulty, because of the liability of the wire to bendif the blows are too lar pin.

heavy, and if the blows are not sufficiently heavy an insufilcient headis formed and the. clasp is liable to go to 'pieces. Bending of the wireor overheading is liable to make the joint too tight. From these causesa considerable percentage of the clasps made are imperfect and unfit foruse.

My invention obviates all of these defects without increasing the cost.

It consists in making. the joint-pin in two parts, the one being a tubewith an open longitudinal joint made of sheet metal, and the other aslender solid pin with an upset head at one end, adapted to be forcedinto the tubu- The tubular parts are cut off at the exact length and ahead formed at one end by upsetting the metal, so that both pivot-headsare made before the clasp istput together, and no hammering is requiredafter the parts are together.

That others may fully understand my invention, I will particularlydescribe it, having reference to the accompanying drawings, whereinxdetached.

Figure 1 is a perspective of my clasp. Fig. 3 is a perspective showingthe parts of the pin showing the parts in place.

A is the base-plate of the clasp, and B is the clamp plate. d e are theperforated ears. These are placed together, so that their perforationscoincide. or are in line. part of the joint-pin, made from sheet metal,tubular by being drawn through a die, or by other suitable means. at oneend by upsetting. The inner part, H, is formed from a rod or wire ofproper size, and a head, 1', is formed thereon in the usual way. Thepins F and Hare cutoff at theproper. length before inserting. K is theclamping spring usually employed. This, however, is not in any degreeconnected with this invention. When the plates AB are put together,thetubular pin F is inserted, and the pin H is thenforced into thetubular part F, as shown. This may be accomplished without theapplication of blows, and in no event will the blows be suflicientlyhard to upset or bend the metal. The diameter of the pin H is slightlygreater than the internal diameter of the part F, so that the latterclasps the former with elastic pressure over its whole surface,

and the consequent frictional pressure is sufficient to prevent theremoval of the, pin H without the application of greater force.

Having. described my invention, what I claim as new, is V 1. In agarment-clasp, the tubular headed pin F, formed of sheet metal, with anopen longitudinal joint capable of expansion, combined with a headedpin, H, in diameter slightly greater than the internal diameter of thetubular pin F, whereby when said pin H.

is driven into said tubular pin F the latter will be slightly expandedand will retain the former by elastic pressure over itssurface, for thepurpose set forth.

2. A garment-clasp'composed of plates A- Fig. 2 is a longitudinalsection F is the outer A head, 9, is formed IOC

